Orignally compiled for the layman in 1926 from excerpts of writings of Dr. T. Henry Moray. In the study of these pages one should consider that both matter and radiations have corpuscular properties as well as wave properties. The corpuscular properties are evident when recognized as highly localized events of very short duration with specific values of electric charge, energy and mass. The wave properties can be proven in different ways which have been proven and taught for so many years. 8.5" X 11"